Ningbo Cooma Acoustics Co., Ltd. PRODUCT Established in 2009, Ningbo Cooma Acoustics Co., Ltd is a professional OEM Outdoor Column Speakers Manufacturers, we focus on developing high-quality products for the high-end market. The products conform to international standards and are mainly exported to Europe, America, the Middle East and other parts of the world. As a China Outdoor Column Speakers Factory, we professionally Custom Outdoor Column Speakers and other smart speakers. Our products have international safety certifications such as CCC, CE, ROHS2.0, IP65, and can be Meet the mandatory requirements of global customers for various safety certifications. We mainly produce ceiling speakers, wall-mounted speakers, column speakers, Bluetooth speakers, power amplifiers, mixing amplifiers and other public address peripherals and smart speakers. Our annual production capacity exceeds 1,000,000 PCS, and we can meet the needs of different customers with different purchases. Active Bluetooth Speakers Product category K-908A 4” 8OHM STEREO BEST SOUND ACTIVE BLUETOOOTH SPEAKER Features: 55W Max Power,AC Power 220V/50Hz or 110V/60Hz, DC12V With FM,USB,Mp3 player,Bluetooth,stereo sound 1- way MIC input,2-way line input With volume BASS and TRABLE Output 4-16Ω Bluetooth Mixer Amplifier Product category D-1030U 20W 1.5U PUBLIC ADDRESS MP3 MIXER AMPLIFIER Features: 20W Power,AC Power 110V-230V 50/60Hz With USB,Mp3,BT 2-way line input,1-way MIC input, and the MIC input is preferentially cut voltage output:100V, Impedance output:4-16Ω stereo sound mixer amplifier Product category M-1055U 55W MAX POWER FM USB MP3 STEREO SOUND MIXER AMPLIFIER Features: 55W Max Power,AC Power 220V/50Hz or 110V/60Hz, DC12V With FM,USB,Mp3 player,Bluetooth,stereo sound 1- way MIC input,2-way line input With volume BASS and TRABLE Output 4-16Ω